A virtual MIMO path-time code for cognitive ad hoc networks

I. Wei Lai*, Chia Han Lee, Kwang Cheng Chen

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

13 Scopus citations


Cognitive radio networks (CRNs) consisting of opportunistic links greatly elevate the networking throughput per bandwidth in future wireless communications. In this letter, we show that by encoding a data packet into several coded packets and transmitting in various time slots, the ene-to-end transmission in the CRN can be equivalently formulated as a physical-layer multiple-input multiple-output (MIMO) communication problem. Two coding schemes are proposed in such a virtual MIMO scenario to enhance the end-to-end communication reliability by exploiting the path diversity. The closed-form expression of the theoretical error rate analysis validates that the proposed path-time codes can significantly improve the error rate performance.

Original languageEnglish
Article number6362128
Pages (from-to)4-7
Number of pages4
JournalIEEE Communications Letters
Issue number1
StatePublished - 2013
Externally publishedYes


  • Multiple-input multiple-output (MIMO)
  • ad hoc network
  • cognitive radio network (CRN)
  • path-time code
  • space-time code


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